They called to stay popular because they kinda suck. The setup you described works on one host and produces static graphs.
With Prometheus and Grafana you can monitor an entire data center and add visualizations for metrics as you need them with no change to the monitored hosts.
TLDR: the old software stack could be made to do this, modern monitoring stacks do it out of the box.
I think they meant to give an example to indicate the flexibility of the platform. You know nobody is claiming people regularly run data centers at home — why are you asking?
With Prometheus and Grafana you can monitor an entire data center and add visualizations for metrics as you need them with no change to the monitored hosts.
TLDR: the old software stack could be made to do this, modern monitoring stacks do it out of the box.